Air shaft / Differential shaftAir shaft is a special shaft for winding and unwinding.The shaft is created by the keys on the surface, which will be expand when the high-pressure gas filled in the shaft.Air shaft is easy to operate, the user only have the air supply with the air pressure controlled within 6-8kg/cm2.Just aired the shaft through the air valve and when user want to lock the web.Just push the core activities of the air valve to deflate, the keys will revert to its original appearance, then web can be removed easily.Air shaft include key type (steel-made or ally-made) and lath type.Air shaft is widely used for winding, rewinding and slitting machines.It is widely used in printing, packaging, plastics, paper, glass, pharmaceuticals, electronic battery, textile machine and industry.